EP0294727B1 - Vorrichtung zum Absperren von Rohrleitungen - Google Patents

Vorrichtung zum Absperren von Rohrleitungen Download PDF

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Publication number
EP0294727B1
EP0294727B1 EP19880108961 EP88108961A EP0294727B1 EP 0294727 B1 EP0294727 B1 EP 0294727B1 EP 19880108961 EP19880108961 EP 19880108961 EP 88108961 A EP88108961 A EP 88108961A EP 0294727 B1 EP0294727 B1 EP 0294727B1
Authority
EP
European Patent Office
Prior art keywords
shutting
shut
hydraulically
pipelines according
guide tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19880108961
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0294727A1 (de
Inventor
Arno Seiberth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Waf Absperrgeraete- und Apparatebau GmbH
Original Assignee
Waf Absperrgeraete- und Apparatebau GmbH
Waf Absperrgerate- und Apparatebau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19873719395 external-priority patent/DE3719395A1/de
Priority claimed from DE8708203U external-priority patent/DE8708203U1/de
Application filed by Waf Absperrgeraete- und Apparatebau GmbH, Waf Absperrgerate- und Apparatebau GmbH filed Critical Waf Absperrgeraete- und Apparatebau GmbH
Priority to AT88108961T priority Critical patent/ATE79937T1/de
Publication of EP0294727A1 publication Critical patent/EP0294727A1/de
Application granted granted Critical
Publication of EP0294727B1 publication Critical patent/EP0294727B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
    • F16K7/10—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with inflatable member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/10—Means for stopping flow in pipes or hoses
    • F16L55/12—Means for stopping flow in pipes or hoses by introducing into the pipe a member expandable in situ
    • F16L55/124—Means for stopping flow in pipes or hoses by introducing into the pipe a member expandable in situ introduced radially into the pipe or hose

Definitions

  • the invention relates to a device for hydraulically shutting off pipelines with a shut-off body which is attached to a guide tube and can be expanded on all sides and which has a structure for application to a pipeline.
  • shut-off device is known from the US Pat. No. 3805844, in which a collapsible, expandable bag is used. This bag is filled with water under pressure to expand it to come into contact with the tube. Dry ice is applied to the pipe from the outside so that the water freezes and forms a solid blocking block.
  • the disadvantage of this known device is that it can only be used to shut off pipes that are already without pressure. Furthermore, a major disadvantage of this known device is that it is very expensive to arrange because of the necessary icing.
  • shut-off bubbles which are introduced through a tapping opening into the pressurized pipe against the direction of flow of the medium.
  • the following problems can arise: Depending on the size of the pipeline to be shut off, a correspondingly large tapping opening must be created, from which gas escapes until the shut-off bladder is inflated and workers are endangered. The pressure on the bladder linkage becomes so strong that the retaining plug is pressed out of the tapping sleeve.
  • the size of the tapping is not uniform, i.e. the conical rubber plugs mounted on the bladder linkage of the shut-off bladders allow tapping openings of different sizes, which, if chosen too small, in turn allow disproportionate wear on the shut-off bladders, since the vulnerability for the aforementioned reasons elevated.
  • a shut-off bladder is known for example from utility model DE-U-75 17 541.
  • shut-off bladder setting devices have been in existence for several years, through which shut-off bladders are introduced into the pressurized line without any gases escaping.
  • an insertion shoe attached to the end of the device which protrudes into the pipeline and sits on the tube plate, takes on the task of inserting the shut-off bladder against the gas direction against injuries caused by the drilling burrs.
  • the same principle is used as for the hand-operated shut-off bladder.
  • the only advantage is in that the pipeline is drilled gas-free through a lock and the shut-off bladder is set and pulled gas-free.
  • there are also such blatant difficulties when setting or pulling the shut-off bubbles that the effort with bladder setting devices does not appear to be justified.
  • the gas shut-off bladder must be housed in a relatively small riser tube, ie diameters from 1 1/2 "to 2" (3.81 cm to 5.08 cm) are available, depending on the manufacturer.
  • the shut-off bladder is connected to a rigid filling tube by means of a screw connection and, before it can be accommodated in the bubble setting tube, must be twisted so that it fits at all. This is particularly difficult with the larger shut-off bubbles, since the volume of the shut-off bubbles is getting bigger, but the intake volume of the setting tube remains the same.
  • shut-off bubbles with larger dimensions twist very easily since a large volume has to be filled. Due to the described difficulty of the small volume of the risers, the shut-off bubbles must necessarily be kept small in their construction, which in turn leads to a reduction in the contact area on the pipe wall. In the worst case, the shut-off bladder sits so twisted in the pipeline that the gas flow continues to flow practically unhindered and the shut-off bladder may have to be pulled and reinserted several times.
  • shut-off bubbles There are also enormous difficulties when pulling the shut-off bubbles.
  • the relatively small-sized shoe prevents the shut-off bladder from being pulled into the seat tube, since the bladder and the protective cover can no longer be twisted together to the smallest possible diameter.
  • the fabric of the protective cover builds up in front of the opening of the shoe, which often leads to the barrier bladder tearing off the linkage and being pushed into the pipeline by the gas flow and being lost.
  • a device for shutting off gas lines by means of a bubble setting device has been described, for example, in utility model DE-U-78 10 001.
  • the object on which the invention is based is to propose a device for the hydraulic shutoff of pipelines of the type mentioned at the outset, with which it is possible to achieve a desired constriction of the dimensionally variable shutoff body.
  • the structure has a ball guide in its interior and that a ventilation bracket is arranged on the device, which prevents the expansion of the filled shut-off body at a predetermined location.
  • the liquid After placing the shut-off body in the pipeline and filling it with the hydraulic fluid, the liquid is sucked out of the shut-off body after completion of the shut-off process, which makes it possible to remove the device according to the invention from the pipeline in a simple manner.
  • the dimensionally variable shut-off bodies according to the invention absolutely seal all types of pipes.
  • this effect is not desirable for all work on pipelines, for example when separating pipelines, whereby defective line sections must be removed from an existing supply line.
  • the pipe part to be removed must be flushed with an inert gas.
  • the well-known gas shut-off bubbles which have a dedicated passage inside. In the known gas shut-off bubbles, it is therefore necessary to provide gas shut-off bubbles specially designed for this purpose.
  • the dimensionally variable shut-off bodies are constricted by means of a venting bracket in the middle of the tapping and two shut-off bodies are created, which let the medium through on the pressure side and continue to seal absolutely on the pressure-facing side.
  • the creeping gas that may occur in the case of strongly incrusting pipes is discharged into the sluice gate, whereby the built-in ball guide and seal limits the gas space to a minimum.
  • the pending pressure can be measured using a removal device on the sluice gate.
  • the material of the ventilation bracket can be rigid or flexible, plastic or metal.
  • the ventilation bracket does not have to completely enclose the shut-off body either.
  • one half or one version that interrupts the sealing in the tapping sleeve is also sufficient.
  • Ventilation bracket Protection against tapping chips that inevitably fall on the tube sheet and are not completely removed by the various methods, such as using magnets or blowing away.
  • the hydraulic shut-off bodies according to the invention expand evenly in three directions even under strong counter pressure. Due to this enormous expansion behavior, there is no need for the stopper, as required by conventional shut-off bubbles. Since the hydraulic shut-off bodies extend far into the tapping sleeve, the effect of positive locking.
  • a device according to the invention is arranged on the pipeline 8 by means of the structure 16.
  • the pipe 8 is to be shut off, but for safety reasons the left pipe part should be flushed with an inert gas. This would be necessary, for example, if defective line sections in the left part have to be removed from an existing supply line.
  • the sleeve 10 is welded onto the pipeline 8. With the aid of a known drilling device, not shown, a hole 9 was drilled in the pipeline 8 under sealing conditions.
  • the structure 16 has now been fastened on the sleeve 10, this device according to the invention being located in the interior of the structure 16.
  • the pear-shaped body 6 is arranged.
  • the ventilation bracket 21 is arranged, which enables the desired constriction of the dimensionally variable shut-off body 6.
  • This ventilation bracket 21 is shown closed in this embodiment. However, it is also possible for only half of this bracket to touch the shut-off body.
  • the spiral 22 is fastened to the device according to the invention and, when the device is inserted, flexibly clings to the inner wall of the tapping sleeve.
  • This spiral 22 can also be replaced by a flexible hose. Any conceivable possibility is open here, provided that this flexible part enables a desired artificial leak to be created.
  • the illustrated spiral 22 lies with its lower end on the bottom of the tube wall and is fastened to the ventilation bracket 21. This makes it possible either to flush the left part of the pipe to be shut off with a gas through the tapping sleeve, or to guide gas located in the left part upwards through this leak and drain it off via a valve.
  • the right part of the shut-off body shuts off the right part of the pipeline 8, as is already the case in the embodiment described above.
  • shut-off bodies Two shut-off bodies are created, the one Let the medium through on the pressure side (on the left according to FIG. 1) and continue to seal absolutely on the side facing away from the pressure (on the right according to FIG. 1).
  • the creeping gas that occurs is discharged into the sluice gate 20, the built-in ball guide 17 and the seal restricting the gas space to a minimum. Measuring the pressure present is possible via the removal device 19 on the setting lock 20.
  • the gas can be controlled via the ball valve 18.
  • the material of the ventilation bracket can be rigid or flexible, plastic or metal.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pipe Accessories (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
EP19880108961 1987-06-11 1988-06-04 Vorrichtung zum Absperren von Rohrleitungen Expired - Lifetime EP0294727B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88108961T ATE79937T1 (de) 1987-06-11 1988-06-04 Vorrichtung zum absperren von rohrleitungen.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19873719395 DE3719395A1 (de) 1987-06-11 1987-06-11 Vorrichtung zum absperren von rohrleitungen
DE8708203U DE8708203U1 (de) 1987-06-11 1987-06-11 Vorrichtung zum Absperren von Rohrleitungen
DE3719395 1987-06-11
DE8708203U 1987-06-11

Publications (2)

Publication Number Publication Date
EP0294727A1 EP0294727A1 (de) 1988-12-14
EP0294727B1 true EP0294727B1 (de) 1992-08-26

Family

ID=25856524

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880108961 Expired - Lifetime EP0294727B1 (de) 1987-06-11 1988-06-04 Vorrichtung zum Absperren von Rohrleitungen

Country Status (4)

Country Link
EP (1) EP0294727B1 (enrdf_load_stackoverflow)
DE (1) DE3874004D1 (enrdf_load_stackoverflow)
ES (1) ES2034029T3 (enrdf_load_stackoverflow)
GR (1) GR3005524T3 (enrdf_load_stackoverflow)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3937690C1 (enrdf_load_stackoverflow) * 1989-11-13 1990-11-22 Friedrichsfeld Gmbh Keramik- Und Kunststoffwerke, 6800 Mannheim, De
GB2248668B (en) * 1990-09-12 1995-05-17 British Gas Plc Abandonment of a branch main
FR2701308B1 (fr) * 1993-02-08 1995-04-28 Daniel Barillet Dispositif d'intervention sur une conduite de gaz nocif basse pression en charge.
FR2701307B1 (fr) * 1993-02-08 1996-07-26 Daniel Barillet Dispositif d'intervention sur une conduite de gaz nocif basse pression.
SE501299C2 (sv) * 1993-05-26 1995-01-09 Tigerholm Ab Metod för att blockera rörledningar och anordning för genomförande av metoden
FR2826429B1 (fr) * 2001-06-20 2003-08-29 Christian Leviel Dispositif d'obturation gonflable a poste fixe pour canalisations de petite section notamment
GB0915253D0 (en) * 2009-09-02 2009-10-07 Brinker Technology Ltd Isolation tool and method
CN107701850A (zh) * 2017-11-13 2018-02-16 北京北排建设有限公司 一种大管径管道快速封堵装置及其使用方法
CN108386556A (zh) * 2018-05-15 2018-08-10 高玉琴 带稳流装置的阀门

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3805844A (en) * 1972-12-29 1974-04-23 V Bacon Plugging device for pipe lines
DE7709218U1 (de) * 1977-03-24 1977-12-01 Aktiengesellschaft Fuer Versorgungs-Unternehmen (Avu), 5820 Gevelsberg Vorrichtung zum einfuehren von aufblasbaren absperrblasen in versorgungsleitungen
DE7917047U1 (de) * 1979-06-13 1979-10-11 Jeschke, Immanuel, 3203 Sarstedt Abdichtvorrichtung fuer gastransportleitungen
DE8132177U1 (de) * 1981-11-04 1982-04-01 Seiberth, Arno, 6720 Speyer "absperrblase bei gasleitungen"

Also Published As

Publication number Publication date
EP0294727A1 (de) 1988-12-14
DE3874004D1 (de) 1992-10-01
GR3005524T3 (enrdf_load_stackoverflow) 1993-06-07
ES2034029T3 (es) 1993-04-01

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